1. Chinese cabbage is a biennial herb in Cruciferae, and its height can reach 60 cm. The whole plant is hairless, with many basal leaves, large, obovate oblong to broadly obovate, blunt apex, wrinkled edge, wavy petiole, white, flat flowers, bright yellow, oblong or ovoid sepals, erect, light green to yellow; Petals obovate, pedicels spreading or ascending, seeds spherical and brown. It blooms in May and bears fruit in June.

2. Chinese cabbage is an annual or biennial herb of Cruciferae, with a height of 70cm, hairless, thick and hard roots, basic leaves obovate or broadly obovate, solid, dark green, shiny, with or without narrow petioles; It blooms in April and bears fruit in May.

3. Lettuce is the common name of lettuce leaves, also known as goose, pigeon and lettuce, belonging to the genus Lettuce in Compositae. It is an annual or biennial herb crop with long obovate leaves and dense cabbage shape, which can be eaten raw, crisp and slightly sweet.

4. Lettuce (Compositae) is native to the Mediterranean coast. Annual or biennial herbs. Fibrous roots, short stems, milky white, alternate leaves, oblong to lanceolate, whole to pinnately parted, lanceolate auricles at the base, slightly bitter or tasteless, head flowers and yellow flowers.

5. Spinach, also known as Persian cuisine, red root cuisine and parrot cuisine, belongs to the genus Spinach and Panicum of Chenopodiaceae. The height of the plant can reach 1 m, the root is conical, reddish, less white, the leaves are halberd-shaped to oval, bright green, whole or with a few toothed lobes. There are many kinds of spinach, which can be divided into spiny and spiny varieties according to seed morphology.